If Xavier means "The New House" that means that it actually is a variant of Casanova (from Casa Nova).
― Anonymous User 5/30/2018
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The name is originally basque and it's written with b, Xabier, although in Australia, France and Germany it's written with v, Xavier. It is thought to mix the basque words of 'house' and 'new'. The name Xavier became popular worldwide because of the founder of the Jesuit order and saint, Francisco Javier (Franciscus Xaverius in Latin) who was born in the Basque Country, north of Spain. If any of you follow European football, you may know this name due to the great basque player, Xabi(er) Alonso (he now plays for the Bayern of Munich). This name is among the most popular names in the Basque Country and apparently, it's expanding to other countries. Basque (original): Xabier Spanish: Javier (like the Spanish actor Javier Bardem) French, German, Australian: Xavier.